Fxtrn ace-grate



L. H. SIMMONS.

FURNACE GRATE.

APPLICATION FILED APR. 20, I9IB- RENEWED SEPT. 2711919.

1 ,32 1,252. Patented Nov. 11, 1919.

' 3 SHEETS-SHEET I.

Inventor:

Lee Jfaward S iin in 072.9,

L. H. SIMMONS.

FURNACE GRATE.

APPLICATION FILED APR. 20. 1918. RENEWED SEPT. 21, 1919.

1,32 1,252. I Patented Nov. 11, 1919.

3 SHEETSSHEET 2. 151923.

I v /9 51 0 10 gw yil'li'l'lflfil'lNW2 n u zzzzn 2 V 6 F 14, 14 m a 655 4 '1 1? 11 5x14 34 53 a? 34 z Inventor.-

Lee Jfawand Sjz' mo L. H. SIMMONS.

FURNACE GRATE.

APPLICATIDN FILED APR. 20. 1918- RENEWED SEPT. 27, 1919.

Patented Nov. 11, 1919.

3 SHEETS-SHEET 3.

Inaentor uNrT D STAT ES PATENT OFFICE.

LEE HOWARD SIMMONS, or GOLDSBORO, ORTH CAROLINA, Assicriron TO smMoNs FORGED DRAFT COMPANY, or .onnom'n CAROLINA.

To all whom it may concern: 1 Be it known that I, LEE HoWARn SIM- MoNs, a citizen of the United States, residing at Goldsboro, and State of North Carolina, have invented certain new and useful Improvements in Furnace-Grates, of which the following is a specification. My inventionrelates to a new and useful improvement in furnace grates and'particularly to the shaker form of grate.

An object of my invention is to provide a furnacegratethat consists of a plurality of grate bars, arranged in two series, the number depending upon the heating area esired. These grate bars in turn are each provided with a plurality of fire bars, all of the fire bars in each grate bar being so arranged that they may be simultaneously shaken and, by arranging the grate bars in;

SeI1eS,-lt is possible to shake all the fire barsin any series of grate bars at theone time.v In other words,'the,grate bars are preferably arranged in two series, that is left and right series and means are provided to shake all the fire b'ars simultaneously in the left series or in the right series.

Another object of my invention is to'pr gvide a furnace grate having a plurality of grate bars arranged in series and wherein each grate bar is in reality but a hollow frame in which rest a plurality of fire bars.

.By constructing the grate bars as shown a large amount of metal is saved and they are 'much less expensive to manufacturer than a gratebar frame. I

- Still another object of my invention'is to grate bar having spaced fire bars bars become damaged by the intense heat,

it is a very simple matter to simply remove the damaged fire bar and insert a new one in the v grate bar, and in the same way, if

it so happens that any one of the grate bars is damaged it is but a simple matter to remove the same and insert a new onel Still another object of my invention is Specification of Letters Patent.

' provide a shaker in the county of -Waynethat is more than simply a oonnsnono, NORTH CAROLINA, A'coRPonArIoN, Fortunes-enacts.

Renewed September-21, 19.19. seal Nb. 32 ,927."

rality of grate bars provided with a plurality of life bars located therein'and each grate bar so arranged that it is possibleto rock or shake all the fire bars in the said Patented 0v. 11,- 1919.

grate comprising a plu- I grate bars at'one timeand also hold them Lin locked position in movement, p s

Still another object of myinvention is to provide a furnace grate of the class above mentioned whereln it is possible'to rock every fire bar in bars with the one movement of an-operating or shaking lever and to lock every fire bar in the one series of grate bars when desired;

Still another object of my invention is to provide a grate bar that is in reality but. a hollow frame having bearing points near its opposite ends for the reception of a rocking member to agitate or rock or shake the firebars located also to hold them' in a at the end of the shaklocked position.

one series of grate With these and other objects in .view

whichwill appear as thespecification conv tinues, my invention consists-iu certain new and novel features and combinations of parts as will be hereinafter more fully described and pointed out in the claims.

Referring now to the drawings, .Figure 1 is a top plan view with a few of the fire bars in position and-the wall of thefurnace in sectio I Fig.- 2 is a front elevation showing one set of barsin section and the/other in ele vation, the set of bars in section being, shown in the rocked or tilted position. Fig. '3 is a side elevationtaken just inside of the outer wall.v Q f Fig. 4 is an enlarged sectional viewtaken through one of the grate bars on line H 'Of Fig. 1 and showing a fire bar in'locked position. H Fig. 5 is a similar view but showing fire bar in raised or shaking position. i Fig. 6 is an enlarged side elevation of one of the rocker bars.

Fig. 7 is an end View taken from the left ofFi'g.6.

These grate Fig. 8 is also an end view taken from the right of Fig. 6, and

Fig. 9 is a side elevation partly in section ofone of the grate bars.

Referring now to the drawings and for the moment to Fig. 1, an installation of my furnace grate is shown wherein a furnace wall 1 is shown which is of any desired depth, and set in this wall arethe two end supporting bars 2 and 3 and a central supporting bar 4 on which bars the plurality of grate bars 4 are desi ed to rest. These grate bars are preferaly arranged in two series such as 5 and 6 and in. Fig. 1 I have shown five grate bars in each series.

It is to be understood however that if a greater heating area is desired a number of grate bars may be added to both series. bars 4 forming the two series?) and 6 are rectangular in shape and each comprises the two side walls 7 and 8 with the end walls 9 and 10. A reinforcing strip or brace 11' is located about centrally of each grate bar which connects the side walls 7 and 8 to snugly brace the same. Each grate bar is provided with four spacing lugs 11, two of which are located on the side wall 7, the other two being located on the side wall 8, these lugs 11 being spaced a slight distance from the end walls 9 and 10.

By providing each grate bar with these spacing lugs-11 the adjacent grate bars are held a slight distance apart, the spacing lugs on one side contacting with the spacing lugs on the side wall of the adjacent grate bar, thus allowin a certain amountof circulation of cold air from beneath the grate bars to keep them from being damaged by the heat of the fire.

vAs the grate bars are all similar, a description of one will be sufficient to understand their construction. r

Referring now for the moment to Fig. 9, it will be seen that the one end wall 9 proects of the bar forming 2. lug as at 12, so that this projection 12 will fit within one of the slots or openings 13 formed longitudinally of the supporting bar 4 to retain the bar in its set position. The other end wall 10 of the grate bar does not extend below the bottom ofhe bar as this end simply rests either on the supporting bar 201- on the supporting bar 3 depending in which series it is Spaced a short distance from each of the walls 9 and 10.is a downwardly extending flanged portion 14 clearly shown in Figs. 2. 3, 4, 5 and 9. These-flanges are provided with openings 15 which form bearing points for the support of a rocker bar 16 which will be hereafter described. A slight opening 17 is left between the wall 9 and the flange porslightly below the level of'the bottom 7 opening 17 down into the ash-pit; This arrangement-is followed at both bearing points in the grate bar as clearly shown in Fig. 1. Located in each grate bar is a plurality of fire bars 18 and as a description of one 15 a description of all, only one will be described for the present.

Referring now to Figs. 4 and 5, these fire bars 18 is clearly shown which extends completely across the grate bar 4' and for a distance beyond the side walls 7 and 8. This fire bar 18 -is of a relatively small transverse thickness (see Fig. 1) so that a number of them can be located transversely in each grate bar. This fire bar 18 is also provided with spacing lugs 19 on one side thereof, which lugs contact with the ad jacent bar on the left to slightly space the fire bars one from another. V

The fire bar 18- is also provided with two downwardly extending flanges 20 and 21, the flange 20 being provided also with an inwardly extending lug or projection 22. These two flanges V 23 which space is greater at the right side than at the'left, as the projection 22 extends into the same. The outer edges of the two flanges 20 and 21 also limit any transverse movement of the fire bars in the grate bar.

Referring now to Figs. 4 to 8 inclusive, a rocker bar 16 is shown, one of these bars to be placed in each of the grate bars. This rocker bar 16 consists 'of a web portion 24 and an elliptical upper contacting portion 25. This rocker bar 16 is reinforced as at 26 or in other words, the upper portion 25,

I the web portion 24 and also the remaining portion form substantially a rail or I- beam construction.

The rightend of this rocker bar 16 is transversely flanged and extends downwardly as shown at 27 and in this end portion is formed one trunnion 28 extending outwardly and on the inner portion and be low the trunnion 28 is a further trunnion 29 leave a rectangular spaceone of' which extends inwardly. The left side of 7 this rocker bar 16 also is flanged and projects downwardly as at 30 and on the outer surface thereof is a trunnion 31. V This trunnion however is located opposite the trunnion 28 or in other words in the same parallel plane. :These two trunnions 28 and31 are designed to rest in the bearing 15 formed in the downwardly depending flanges 14 of the grate bars heretofore'mentioned.

By lancing at Figs. 7 and 8 the relative length of the right and left ends 27 and 30 of the rocker bars 16 may be clearly seen. The extra pin or trunnion 29 on the right bar 32.

end 27 of each of the rocker bars 16 is for the purpose of fitting within a bar 32, so that all the rocker bars in an entire series may be moved bywthe movement of this By connecting all the rocker arms 16 to the shaker bar 32' amovement of this bar will move' all of the rocker bars 16 in the series, which in turn move or shake the fire movement Wlll be bars 18 which shaking shortly referred to.

Glancing at Figs; 4 and 5 again for the moment, it will be seen first that in Fig. 4 the rocker bar 16 is in a locked position, that is, as this rocker bar is mounted eccentri; cally with relation to the fire bar in a grate bar, when in a left handed tilted position,

I as shown, the lower surface of the elliptical or upper portion of the rocker bar 16 will contact with the upper surface'of the projection. 22, thereby holding the firebar 18 against any upward movement, and likewise every 'fire bar in the grate bar.-

The height of the rockerbar 16 is such that when the shaker bar .32 is moved outwardly or to the left with regard to Figs. 4 and 5, the rocker bar 16 in assuming an upright position will force the fire bar 18 up- .wardly at one end, raising it completely ofi one of the side walls as shown in'Fig. '5. That is, the radius of the rocker bar from the'bearing point 15 and the upper surface of the contact portion 25, is greater than. the

distance between the defining upper edge of the space 23 of the firebar and a line drawn to the center of the bearing point 15,so that,

I when the rocker. bar 16 is in an upright position as shown in Fig. 5, one of the ends of the fire bar will be raised from the side walls. Either end of the fire bar 18 might be raised depending on the weight on the said fire bar. It will be seen that if one end of the fire bar was more weightedv than the other, the end meeting with the less re sistance would be raised. The fire-bar 181s bound to be tilted when the rocker bar 16 is in an upright position as shown in-Fig. 6

the same time, will tilt-inthe other direc- Ytion. Forcing the lever 32 to the right, as

viding this clamp the length of travel of the regards to Figs; 4 and 5, will return the rocker bar'16 to the position shown in Fig.

4 thereby again locking the fire bar 18.

shown, and bar.

Referring for the moment to Figs. "1, 2 and 3, it will'be seenthat this bar 32 is conof course all others in the grate nected by a clamp 33 to a rod 34 which in turn is p ted y a handle 35 which is fulcrumed to a base or support 36. By proeratin shaker bar 32 with relation tothe movement of the handle is established, so that the movement ofrocker b rs 16 in turn will be limited. Transver /movement is allowed for as may be seen by comparing the position of the fire bars in Figs. 4 and 5.

There are two handles 35, one for each series of grate bars and rocker bars similar in all respects to each other, one for operating all of the fire bars located in the grate bars forming series 5 and the other for opg all of the fire bars in the grate bars in series 6. Y From the foregoing it will 'be seen that my grate consists of two seriesof grate bars, which bars are in turn provided with a plurali'ty of spaced fire bars, and located in each fire bar is a rocker bar, which is eccentrically from one end and some from another when said rocker bar is forced to an upright position,and which rocker bar, by its construction, will also retain all of the fire bars-in a locked position when said rocker bar is in an angular or tilted position. Each of the rocker barsin the series is connected to a shaker bar which is, in turn, connected by a clamp to a rod operated by a handle so that a movement of the handle will tip or rock every fire barin the grate bars in the one serie's;and a movement of the other handle will likewise tip or rock all the fire bars in fine shaking movement is therefore obtained and with but a fewiopera-tions of the handles the fire bed will be greatly agitated.

'the grate-bars arranged in that series. .A.

It will also be'seen that my grate areexceedingly simple in construction each; I

comprising but side. walls and end walls, spacing lugs and; depending flanges near its opposite ends in which are formed bearing points for. arocker bar. Likewise the fire bars are simple in construction and cheap to manufacture and are so constructed their under portion thatthey maybe tilted by movement of-the rockerbar or may be held tightly in a. locked positionwhen so desired. Also that it is a simplematter to replace one or all of the bars andlikewise a simple matter to replace one ortall of' The grates are especially adapted totem 0 use of'fine .or. pulverized fuel althougha coarser grade may be used iii-necessary. P i

"Myentire grateis one that very'i'eflicient Qinservice and has'Tbeen successfiill'yj;

under 700 horse-powerboilers.

1 M nges maybe mad' construction of the;: grate without in any manner departing from the spirit and scope of theinvention. v 1 vand open at its top and bottom, depending flanges near its opposite ends and bearing points formed in said depending flanges,

fire bars located in said grate bar and ar-. ranged transversely thereof, a rocker bar pivotally mountedin the bearings in said depending flanges to agitate said fire bars with relation to the grate bar when said rocker bar is operated.

2.7 A furnace grate comprising in part a hollow grate'bar, two side walls and end walls, one of the end Walls provided with-a downwardly extending lug thereon, two downwardly extending flanges formed near the ends of said grate bar and provided with two cut out portions to form bearing points for a rocker bar, the cut out portions extending beyondsaid depending flange to form an openlng.

3. A furnace grate comprising in part a hollow grate bar having side and endv walls and spacing lugs formed on said end walls, two downwardly extending flanges extending between said side walls and located near the ends of said grate bar, said flanges provided with openings therein to form bearing points, a plurality of transversely positioned fire bars located on the upper portion of said side walls and an eccentrically mounted rocker bar in said grate bar for raising the said fire bars when said rocker bar is moved to an .upright position.

4. An-furnace grate comprising in part a grate bar consisting of side and end walls and depending flanges extending from the s1de walls, said downwardly extending flanges located near thetwo end walls, said flanges provided with hearing points for the reception of a rocker bar, a plurality of fire bars located in said grate bar and resting on the two side walls, a rocker bar' mounted in' said downwardly extending flanges, said rocker barbeing eccentrically mounted sothat when moved to' an upright.

position said fire bars will be raised from one of the said walls of said grate bar and said rocker bar so constructed as to hold said fire bars in a locked position when said rocker bar is moved to a tilted position.

5. A furnace" grate comprising in part, a hollow grate bar, fire bars located transversely in said grate bar, said fire bars provided with downwardly extending flanges and one of said'flanges provided with an inwardly extending lug, a rocker bar eccentrically -mounted in said grate bar and adapted to tilt said fire bar when inan' upright position, the upper portion of said said lug adapted to be held by said rocker bar when said rocker bar is in a tilted position and said fire bars adapted to be raised in said grate bar when said rocker bar is in a vertical position.

7. A furnace grate comprising in part a grate bar, a rocker bar mounted within said grate bar and fire-bars located transversely of said rocker bar, the radius of said rockerbar being greater than the distance between the bearing point of said rocker bar and the under portion of said fire bar so that said fire bar will be moved when said rocker bar is operated.

8. A furnace grate comprising in art a grate'bar provided with downwar y extending flanges and provided with openings for the reception of a rocker bar, fire bars located in said grate bar and adapted to be tilted when said rocker bar is. swung to .a-

vertical position and said fire bars adapted to be tightly held in said grate bar when said rocker bar is moved to a' tllted position.

9. A grate bar comprising end walls and side walls and a rocker bar in said grate bar, 1

fire bars located in said grate bar and pro vided with downwardly extending flange portions and an inwardly extending lug onone of said flange portions, said rocker.

bar having an enlarged head atits upper end and said head adapted to rest on said inwardly extending lug when said rocker bar is forced to a tilted position and the said fire bars adapted to be raised and shakennwhen said rocker bar is forced to a vertical position.

10. A furnace grate comprising a plurality of series of hollow grate bars, a shaker bar located under each of said series of hollow grate bars, a rod connected to each of said shaker bars and a handle connected to each of said rods, fire bars located in said grate bars and arranged transversely thereof, a rocker bar pivotally mounted in each of said grate bars, the rocker bars in one series connected to one of said shaker bars and the rocker bars in' the other series connected to the other of said shaker bars, said rocker bars being'so mounted that when forced to an'upright position the said fire 7 bars will be raised with regardto said grate bars and said rocker bars arranged to lock with said fire bars when said shaker bars are forced inwardly.

11. A furnace grate comprising a plurality of hollow grate bars, a pluralit of fire bars located in each of said grate ars, means for tilting said fire bars with relation to said grate bars, the said meanscapable of tilting some of the bars from one end and the other of said bars from the other end.

rality of grate bars, lurality of fire bars located in each of said grate bars and arranged transversely thereof, said fire barscapable of a slight transverse movement in said grate bars, means for tilt' saidfire bars within said grate bars andsald fire bars being capable of being tilted from either of 20 their ends.

In testimony whereof I afiix my signature.

LEE HOWARD SIMMONS. 

